Browse Prior Art Database

Self-Cleaning Magnetic Recording Slider

IP.com Disclosure Number: IPCOM000117832D
Original Publication Date: 1996-Jun-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Nayak, JH: AUTHOR [+4]

Abstract

Excessive accumulation of contaminants at a recording head can lead to increased stiction when the head is parked on the disk. To avoid such contamination and resulting stiction, the present invention proposed to heat up the head during flying.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 79% of the total text.

Self-Cleaning Magnetic Recording Slider

      Excessive accumulation of contaminants at a recording head can
lead to increased stiction when the head is parked on the disk.  To
avoid such contamination and resulting stiction, the present
invention proposed  to heat up the head during flying.

      Assuming that a certain level of hydrocarbon contamination is
present and unavoidable in a closed file, one method for reducing
stiction is to reduce or eliminate the buildup of the contamination
on the slider.  The method proposed here is to pass electric current
through a resistive heating element to heat up the deposition end
and/or the air bearing surface of the recording head structure to
evaporate the condensed material.  This heating or "self-cleaning"
operation is performed periodically, e.g., once every eight hours.
The heating element may be, for example, any combination of the
inductive recording head coil, the Magnetoresistive (MR) sensor, a
special heating element embedded in the slider, or a heating source
external to the slider body.

      Experiments have shown that heat temperature increases of up to
a 100 degrees can be achieved at the trailing end of the head support
structure if the write coil is used as the heating element.  If the
slider is unloaded from the disk, experiments show that a temperature
of over 150 degrees can easily be reached.

      The proposed heating process may also be used to reduce
stiction for a loaded head just p...